Materials Literature
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"Bottom up" type nanoparticle (NP) self-assembly is expected to provide facile routes to nanostructured materials for various, for example, energy related, applications. Despite progress in simulations and theories, structure prediction of self-assembled materials beyond simple model systems remains challenging. Here…
γ-Fe(2)O(3) nanoparticles were formed inside the cage-like pores of mesocellular foam (MCF). These magnetic nanoparticles showed a uniform size distribution that could be easily controlled by the MCF pore size, as well as by the hydrocarbon chain length used for MCF surface modification. Throughout the entrapment proc…
Based on Floquet scattering matrix theory, the electron transmission through a periodic time-dependent potential in monolayer graphene is studied. It is found that the quantum interference between the bound states and continuum states due to the interaction of electron with oscillating field can result in the occurren…
An ultra‐broad working temperature dielectric material, BaTiO 3 – Na 0.5 Bi 0.5 TiO 3 – Nb 2 O 5 – MgO –Glass with Nd 2 O 3 addition, was investigated for the first time. Microstructure and dielectric properties of the well‐sintered samples were studied. XRD results showed the formation of tetragonal perovskite and th…
Abstract Funktionelle organische Materialien sind von großem Interesse für eine Vielzahl von Anwendungen. Um funktionelle Eigenschaften gezielt einstellen zu können, benötigt man wohldefinierte hierarchisch geordnete supramolekulare Materialien. Die Selbstorganisation von Flüssigkristallen hat sich als ein extrem nütz…
Abstract In this study, series of chitosan derivatives containing active groups were synthesized and evaluated for their antifungal activity against three crop‐threatening fungi, Fusarium oxysporum. f. sp. Vasinfectum, Alternaria solani , and Valsa mali . Schiff bases of carboxymethyl chitosan (As: 2‐(2‐hydroxy‐5‐nitr…
Farbschemata: Ein mechanochromes Material aus zwei Arten von Peptiden, die mit einer Pyrengruppe bzw. Rhodamin-B-Einheiten funktionalisiert sind, kann mehrere Lumineszenzfarben wie Blau, Grün und Rötlich annehmen (siehe Bild). Das mechanochrome Verhalten beruht auf einer Kombination von Strukturänderungen in molekular…
Despite natural amino acids having been proposed as the green surrogate of currently used corrosion inhibitors that are generally toxic to both nature and human body during the everyday industrial processing of metallic equipments, their structural simplicity yet lowers the inhibitive potency, thereby hampering their…
A binary BiTe nanocompound for thermoelectric applications was prepared via a water-based chemical reaction under atmospheric conditions. We attempted to increase the carrier mobility of the nanocompound by adopting a post-thermal treatment consisting of calcination and reduction at different temperatures. We also tri…
Atomic-layer deposition (ALD) and sputtering of platinum are used to create catalyst nanostructures with high triple-phase-boundary (TPB) densities and a low current-collecting resistance for solid-oxide fuel cells (SOFCs). A 90% increase in the fuel-cell peak power density is observed relative to catalyst structures…
Abstract Calcium carbonate is the most abundant biomineral that is biogenically formed with a vast array of nano and microscale features. Among the less stable polymorphs present in mineralized organisms, the most soluble, amorphous calcium carbonate (ACC), formed in chitin exoskeletons of some crustacea, is of partic…
The chemical morphology of graphene oxide sheets (GO) is characterized by the presence of functional carboxylic groups (at the edges) and epoxy and hydroxyl groups (at basal plane). Using divalent calcium ions, this morphology is used to bind the sheets together into an exfoliated sheet assembly or compact multilayers…
The unusual redox behavior displayed by the two isomers of the Wells-Dawson phosphotungstate anion [Fe(H(2)O)P(2)W(17)O(61)](7-) is presented. The electrochemical measurements have been performed in aqueous media at different pH values from 0.5 up to 8.0. The cyclic voltammetry has also been carried out in organic med…
Abstract Jute and coir fiber‐reinforced polypropylene (PP) composites (45 wt% fiber) were prepared by compression molding. Composites were fabricated with irradiated jute fiber/irradiated PP and irradiated coir fiber/irradiated PP at different doses (250–1,000 krad). It was revealed that jute‐based composites had bett…
Photoresponse characteristics of ZnO thin films deposited by three different techniques namely rf diode sputtering, rf magnetron sputtering, and electrophoretic deposition has been investigated in the metal-semiconductor-metal (MSM) configuration. A significant variation in the crystallinity, surface morphology, and p…
The thermal conductivity (λ) of nanoconfined polyamide-6,6 (PA) oligomers in polymer–graphene nanocomposites has been investigated by reverse nonequilibrium molecular dynamics (RNEMD) simulations. The preferential alignment of the PA chains parallel to the graphene plane as well as their elongation implies that λ of t…
The preferential incorporation of Er 3+ ions into the PbF 2 nanocrystals during the ceraming process of oxyfluoride glass was analyzed using electron energy loss spectroscopy analysis. Concentrations of Er 3+ ions were considerably higher in PbF 2 nanocrystals compared to those in the glass matrix. Changes in lineshap…
Pronounced variations of the crystallite size of hafnia ( HfO 2 ) precipitates in silicon oxycarbide ( SiOC )– HfO 2 ceramic nanocomposites were studied by TEM upon annealing bulk samples at 1300°C for times ranging from 1 to 200 h. TEM investigations revealed homogeneous nucleation and crystallization of hafnia in th…
Er3+ doped CaBi2Ta2O9 (CBT) bismuth layered-structure high temperature piezoelectric ceramics were synthesized by the traditional solid state method. The upconversion (UC) emission properties of Er3+ doped CBT ceramics were investigated as a function of Er3+ concentration and incident pump power. A bright green upconv…
Experimental investigations and first-principle calculations based on density functional theory are effectively combined to shed light on origin of room temperature ferromagnetism in nitrogen doped ZnO (ZnO:N) based intrinsic dilute magnetic semiconductors. ZnO:N thin films grown by pulsed laser deposition show a well…